Grow Light Kit, 6" Horizon Cool Sun Air Cooled Reflector (21" x 23"), 400w MH Bulb, 400w HPS Bulb, 400w Digital Ballast, Light Hangers, Analog Timer 6" Air Cooled Reflector (21" x 23") 400w Digital Ballast - UL Listed 400w MH & HPS Bulb YoYo Light Hangers Analog Timer